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. 2020 Mar 12;20(6):1583. doi: 10.3390/s20061583

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© 2020 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Figure A2 — Summary of analysed ECG recordings. (a) Beat-to-beat heart rate variation. (b) Histogram of heart rate and corresponding probability. (c) Poincare plot of n^th heartbeat against (n + 1)^th heartbeat. (d) Histogram of heart rate difference.